This statue of the famed author, actor, and journalist is made entirely of screw-nuts.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A giant portrait of an ancient king looms over the river.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

One of Hungary's most influential places of learning is also home to one of the world's most beautiful libraries.

The ruins of an early 1900s neo-Baroque mansion sit nestled in a local park in the Hungarian plains.

This castle was designed to have as many windows as there are days in the year.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The first modernist church in Europe.

Visiting this café is like visiting the Austrian grandma you wish you had.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The resting place for anonymous victims of the Danube's dark waters.

This museum promotes informed contraception by documenting its often secret past.

Handsomely crafted representations of our round planet.

The topiary maze at the Habsburg hunting lodge.

A public work of art that also provides some relief from the summer heat.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

A peculiar museum that includes many drunken tales, a drunk driving simulator, and much more.

This abandoned gun tower was built to defend the River Thames from a French naval attack.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.